Spirodela Polyrrhiza
Spirodela
Herausgegeben: Maverick, Agamemnon
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Spirodela polyrrhiza (orth. var. S. polyrhiza) is a species of duckweed known by the common names greater duckweed, common duckmeat, and duckmeal. It can be found nearly worldwide in many types of freshwater habitat. It is a perennial aquatic plant usually growing in dense colonies, forming a mat on the water surface. Each plant is a smooth, round, flat disc one half to one centimeter wide. It produces several minute roots. It also produces a pouch containing male and female flowers. The top part dies in the fall and the plant often overwinters as a turion.
